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W. M. WHITNEY.-

ROTARY CUTTER.

APPLICATION FILED MAR. 23. 1917.

Patented July 1, 1919.

TWILLIAM M. WHI'I'I'TEY, 0F WINCHE 'NDON, MMSAGHUt-EETWS.

ROTARY CUTTER.

Specification of Letters Patent. 7

Patents July it, rare.

Application filed March 23, 1917. Serial No. with).

at all whom it may concern Be it known that 1, WILLIAM M. WHrrmay, a citizen of the United States, residing at Winchendon, county of Worcester, and State of Massachusetts, have invented an Improvement-in Rotary Cutters, of which the following description, in connection with the accompanying drawings, is a specification, like characters tin the drawings representing like parts.

The invention to be hereinafter described relates to tools and more particularly, to.

I working diameter of the cutter. Also, the

blades must be adjusted so as t-o project equally from the'body of the cutter 1n order that each shall perform its share of the work.

The present invention provides simple, strong, and effective means for ad usting the blades relatively to the body of the cutaid til

ter, and securing the same in their different positions of adjustment.

The character of the invention ma be best understood by reference to the fo lowing description of onev good form of the inention shown in the accompanying drawing, wherein: v f Figure l is a perspective view of a cutter embodying the invention;

Fig. 2 is a perspective unassembledview of a blade and devices for securing the same to the body of the cutter; and

Fig. 3 on an enlarged SBalBIS a sectional view showing a portion ofthe body of the cutter, a blade, and securing and adjusting devices therefor. Q

Referring to: the drawing: The device there shown as embodying the inventlon 1s a rotary cutter comprising a body 1 of polygonal shape having a hu'b 3 provided with a slot 5 for receiving the usual key foreccuring the cutter to the spindle of a milling or other machine.

The body serves as a carrier for a series of tools, in the present instance of the invention, in the form of blades 7 having their outer ends beveledand sharpened present forward cutting edges' a These tools are suitably mounted on the of the invention, the body is provided with perlpheral recesses 11 projecting in a general body and to this end, in the present instance radial direction and with the planes of said" recesses oblique to the plane of the body of the cutter. The blades may be of a thickness corresponding to the recesses and have a .close slidin fit therein, but preferably project lateral y somewhat beyond the sides of said body.

Next will be described means for adjustmg and securing the blades in said recesses. Toaccompllsh this, eachblade may be provlded with a screw 15 or equivalent member.v

In the present instance of the invention this screw is interposed between a wall of a blade and a wallof the recess in which the blade is mounted, but is threaded to merely one of said walls, the construction being such that on rotation of the screw the blade will be adjusted outward relatively to said body. Preferably, the walls engaged by the screw are mating grooves 17 and 19, one being, in

the-back of the blade and the otherbeing with the threads thereof intermeshing.

Then the blade and screw may he slid, as a unit into the recess.

Preferably, the threads are square or blunt to iacilitate their slide along and pressure against the recess groove without injury to either the teeth or said groove.

When the screw and blade are mounted in the recess, the screw should be confined against iny'vardv movement. This maybe end of the screw with a suitable abutment which may conveniently be the bottom 21 of the recess.

Thus, the screw not only constitutes a simple and effective means for adjusting the the blade'and with the base of the recess,

accomplished by engagement of the inner blade, but by its positive engagement with positively prevents inward movement of the blade after it is adjusted to the desired position;

The'screw may have a slot 23 in its outer end for receiving a screw driver in adjusting the same and preferably the top of the screw does not project out beyond the pe- -riphery of the body, but is substantially flush therewith and consequently isin out of the way of the active end of the blade.

The construction is such that when the screw is rotated it reacts'on the bottom of the recess and forces the blade outward. Obviously, by this means, all of the blades may be set equally with any desired nicety of adjustment as required.

Since the blade may be readily adjusted outward, it is not necessary to employ a long blade which will extend a substantial distance beyond the periphery of the body to allow for reduction in th length thereof from sharpening, ()n the contrary, a shorter blade may be used hay ing its active cutting edge projecting merely a short distance beyond the peripheryof the body of the cutter. Consequently, substantially the entire length of the blade is backed and supported by the rear wall of the recess. This the front face of the blade and press the latter and the screw toward the back wall of the recess.

The screw preferably is located between the blade and the wall of the recess opposite the forward cutting edge of the blade. As a result, in use, the pressure on said edge forces the blade back against the screw and tight engagement of their threads is assured.

"Since the screw is confined in the mating grooves of the blade and recess, it positively prevents the blade from sliding in its recess -transversely to the plane of the body of the cutter.

Thus, the single screw may serve to a just the blade outward, to limit its movement inward, and to prevent its movement laterally of the cutter.

The parts of the cutter are few in number, simple and strong in construction, and easily assembled and adjusted.

It will be understood that the invention is not limited to the specific embodiment shown, but that extensive deviation may be made therefrom without departing from the spirit and scope of the appended claim.

What is claimed is:

A rotary cutter comprising in construction, a body having blade receiving recesses, the front and rear walls of which extend uninterri'iptedly from the outer to the inner limits of the recesses, blades mounted in said recesses and provided with uninterrupted front and threaded rear faces, a screw hf uniform dimension from end to end engaging the rear threaded face of each blade, said screw and its associated blade being adapted to be inserted in a recess of the body in assembled relation, transversely extending wedge receiving openings formed in the body transversely of and communicating with the blade receiving openings through the front walls thereol, and flat faced wedges adapted to be inserted in said transversely extending wedge shaped openings and acting to force the screws into close contact with the threaded rear face of the blades and against the smooth unthreaded rear walls of the recesses to lock the blades and permit ready removal or insertion of the blades and screws while in assembled relation.

In testimony .whereof, I have signed my name to this specification.

WILLIAM M. WHITNEY. 

